Electron shuttle-dependent biofilm formation and biocurrent generation: Concentration effects and mechanistic insights
文献类型：期刊论文
| 作者 | Zhu, Xiao; Dou, Fei; Long, Mingliang; Wang, Xinxin; Liu, Wei; Li, Fangbai; Liu, Tongxu; Wu, Yundang |
| 刊名 | FRONTIERS IN MICROBIOLOGY
 |
| 出版日期 | 2023 |
| 卷号 | 14页码:1070800 |
| 关键词 | HUMIC SUBSTANCES REDUCTION MEDIATORS ACCEPTORS SYSTEMS |
| ISSN号 | 1664-302X |
| DOI | 10.3389/fmicb.2023.1070800 |
| 英文摘要 | IntroductionElectron shuttles (ESs) play a key role in extracellular electron transfer (EET) in Shewanella oneidensis MR-1. However, the quantification relationship between ES concentration, biofilm formation, and biocurrent generation has not been clarified. MethodsIn this study, 9,10-anthraquinone-2-sulfonic acid (AQS)-mediated EET and biofilm formation were evaluated at different AQS concentrations in bioelectrochemical systems (BESs) with S. oneidensis MR-1. Results and discussionBoth the biofilm biomass (9- to 17-fold) and biocurrent (21- to 80-fold) were substantially enhanced by exogenous AQS, suggesting the dual ability of AQS to promote both biofilm formation and electron shuttling. Nevertheless, biofilms barely grew without the addition of exogenous AQS, revealing that biofilm formation by S. oneidensis MR-1 is highly dependent on electron shuttling. The biofilm growth was delayed in a BES of 2,000 mu M AQS, which is probably because the redundant AQS in the bulk solution acted as a soluble electron acceptor and delayed biofilm formation. In addition, the maximum biocurrent density in BESs with different concentrations of AQS was fitted to the Michaelis-Menten equation (R-2 = 0.97), demonstrating that microbial-catalyzed ES bio-reduction is the key limiting factor of the maximum biocurrent density in BESs. This study provided a fundamental understanding of ES-mediated EET, which could be beneficial for the enrichment of electroactive biofilms, the rapid start-up of microbial fuel cells (MFCs), and the design of BESs for wastewater treatment. |
| WOS研究方向 | Microbiology |
| 语种 | 英语 |
| WOS记录号 | WOS:000948868700001 |
| 源URL | [http://ir.gig.ac.cn/handle/344008/80364]  |
| 专题 | 中国科学院广州地球化学研究所 |
| 推荐引用方式 GB/T 7714 | Zhu, Xiao,Dou, Fei,Long, Mingliang,et al. Electron shuttle-dependent biofilm formation and biocurrent generation: Concentration effects and mechanistic insights[J]. FRONTIERS IN MICROBIOLOGY,2023,14:1070800. |
| APA | Zhu, Xiao.,Dou, Fei.,Long, Mingliang.,Wang, Xinxin.,Liu, Wei.,...&Wu, Yundang.(2023).Electron shuttle-dependent biofilm formation and biocurrent generation: Concentration effects and mechanistic insights.FRONTIERS IN MICROBIOLOGY,14,1070800. |
| MLA | Zhu, Xiao,et al."Electron shuttle-dependent biofilm formation and biocurrent generation: Concentration effects and mechanistic insights".FRONTIERS IN MICROBIOLOGY 14(2023):1070800. |
入库方式： OAI收割
来源：广州地球化学研究所
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